whats not needed on the nikki
07-17-07, 11:27 AM
#1
whats not needed on the nikki
i followed and performed Ray's rat's nest removal on my 85 S, and awaiting Jon's suppliment to it, lol, and am wondering if someone can direct me to a thread that describes what components are not needed on the nikki and any pros and cons to removing all of the not needed stuff. just trying to clean up my carb and get rid of things that serve no purpose.
07-17-07, 07:32 PM
#2
Vipernicious posted a stealth post on this a few weeks ago, even sent out the previews to a few people:
https://www.rx7club.com/1st-generation-specific-1979-1985-18/need-few-good-%2Acarb%2A-guys-review-669628/
I read it, the draft was excellent and better than anything out there, although I'd give this one a close second:
https://www.rx7club.com/1st-gen-archive-71/intake-carb-rebuild-how-strip-nikki-down-648376/
In fact it was Glazed Ham's post that inspired me to do this:
https://www.rx7club.com/1st-generation-specific-1979-1985-18/tuning-stripped-nikki-660381/
Jon says his tutorial is in revision and will be out soon, but it might help to harrass him by reactivating his post:
https://www.rx7club.com/showthread.php?t=669628
Unfortunately he didn't say much about pros and cons of stipping your Nikki and almost nothing about how the stripped Nikki relates to the gone rats nest. Like, which nipple do you hook the dizzy vacuum to and, if you have it, the AC vacuum? Anyway, most of what you need is there and you can pretty much figure out the rest by trial and error, that's what I did.
Just a word of advice, having been there, done that and had a good time doing it - Use block off plates (not JB weld) for the altitude compensator, or better, just leave it on. And avoid the mechanical secondaries, unless you've already driven a car set up that way and liked it. One of the cool things about taking out your rats nest and stripping the Nikki is that you get to start thinking about what it would be like if you had this thing or that thing back on.
Incidently, "Ray's rat nest removal":
https://www.rx7club.com/1st-generation-specific-1979-1985-18/my-new-rats-nest-662907/
isn't mine, I followed Carl's tutorial:
http://maz_tutorials.ten15.net/Tutorial_1.pdf
in every detail (even when I should have known better, like on the dizzy vacuum hookup).
Also I got lot's of help along the way on that post, so hopefully the post and photos will help people who might want to give it a try it.
https://www.rx7club.com/1st-generation-specific-1979-1985-18/need-few-good-%2Acarb%2A-guys-review-669628/
I read it, the draft was excellent and better than anything out there, although I'd give this one a close second:
https://www.rx7club.com/1st-gen-archive-71/intake-carb-rebuild-how-strip-nikki-down-648376/
In fact it was Glazed Ham's post that inspired me to do this:
https://www.rx7club.com/1st-generation-specific-1979-1985-18/tuning-stripped-nikki-660381/
Jon says his tutorial is in revision and will be out soon, but it might help to harrass him by reactivating his post:
https://www.rx7club.com/showthread.php?t=669628
Unfortunately he didn't say much about pros and cons of stipping your Nikki and almost nothing about how the stripped Nikki relates to the gone rats nest. Like, which nipple do you hook the dizzy vacuum to and, if you have it, the AC vacuum? Anyway, most of what you need is there and you can pretty much figure out the rest by trial and error, that's what I did.
Just a word of advice, having been there, done that and had a good time doing it - Use block off plates (not JB weld) for the altitude compensator, or better, just leave it on. And avoid the mechanical secondaries, unless you've already driven a car set up that way and liked it. One of the cool things about taking out your rats nest and stripping the Nikki is that you get to start thinking about what it would be like if you had this thing or that thing back on.
Incidently, "Ray's rat nest removal":
https://www.rx7club.com/1st-generation-specific-1979-1985-18/my-new-rats-nest-662907/
isn't mine, I followed Carl's tutorial:
http://maz_tutorials.ten15.net/Tutorial_1.pdf
in every detail (even when I should have known better, like on the dizzy vacuum hookup).
Also I got lot's of help along the way on that post, so hopefully the post and photos will help people who might want to give it a try it.
07-19-07, 09:55 AM
#6
Pros:
- Easier to get the top off for changing jets, needles and seats, etc...
- Less points of failure, including the damn shutter valve. Yet again last night I found another person who had his shutter valve fail in the fully-closed position *sighs*
- Easier to track things like vacuum leaks
- Much simpler to rebuild when you start with a stripped carb. Less parts to keep track of
- Easier access to the throttle linkage by hand, so if you're working in the engine bay and it starts to sputter and die, you don't have to have a friend touch the gas, you can do it by hand.
- Compliments the Rat's Nest removal, Air Pump removal and changing of exhaust for performance exhaust such as Racing Beat, again simplifying things.
- Makes the engine bay look cleaner
Cons:
- If you frequently travel to high altitudes, cross mountain ranges, etc... You won't have the altitude compensator, so you may have sluggish performance at high altitudes
- If you want to pass emissions, forget about it!
-
I could think of more, but stuff just exploded at work, I've gotta run.
Jon
- Easier to get the top off for changing jets, needles and seats, etc...
- Less points of failure, including the damn shutter valve. Yet again last night I found another person who had his shutter valve fail in the fully-closed position *sighs*
- Easier to track things like vacuum leaks
- Much simpler to rebuild when you start with a stripped carb. Less parts to keep track of
- Easier access to the throttle linkage by hand, so if you're working in the engine bay and it starts to sputter and die, you don't have to have a friend touch the gas, you can do it by hand.
- Compliments the Rat's Nest removal, Air Pump removal and changing of exhaust for performance exhaust such as Racing Beat, again simplifying things.
- Makes the engine bay look cleaner
Cons:
- If you frequently travel to high altitudes, cross mountain ranges, etc... You won't have the altitude compensator, so you may have sluggish performance at high altitudes
- If you want to pass emissions, forget about it!
-
I could think of more, but stuff just exploded at work, I've gotta run.
Jon
07-19-07, 10:11 AM
#7
I also hope to eventually take Carl/Pratch's rat's nest removal tutorial, my thread on PCV Valves, and a tutorial that hasn't been created yet on rebuilding a stock nikki and turn it into the ultimate guide to the S3 Rx7 carburetor. But don't hold your breath for that, it's a long way off yet. So for now I'm keeping the pieces seperate.
Jon
Jon
Trending Topics
07-19-07, 12:51 PM
#9
Easier compared to stock without being stripped
My sterling was easy, and my stripped nikki almost as much. When tuning I left the 6 air horn screws out and left it on with only the main stud through the middle and the split-pin for the fast-idle. I was in and out ultra-quick.
Compare that to having to remove the choke stuff every time you want into the carb, and the benefits of having that stuff removed beforehand become apparent.
Yes, a Nikki in general isn't as easy to change jets on as some other carbs, but a stripped Nikki is easier than a stock Nikki.
Jon
My sterling was easy, and my stripped nikki almost as much. When tuning I left the 6 air horn screws out and left it on with only the main stud through the middle and the split-pin for the fast-idle. I was in and out ultra-quick.
Compare that to having to remove the choke stuff every time you want into the carb, and the benefits of having that stuff removed beforehand become apparent.
Yes, a Nikki in general isn't as easy to change jets on as some other carbs, but a stripped Nikki is easier than a stock Nikki.
Jon
07-19-07, 01:33 PM
#10
i just want the simplicity and tuneability. this 85 S is my play car. i'm trying new things with it that i've never attempted before. i just want all of the not needed stuff off of that carb. i dont think i want to go to mechanical secondaries though. i'm fine with the vaccume controled secondaries. if i did go to mechanicals, i'd be tempted to tamper with the accelerator pump a bit so aleviate the (from what i've read) bog when putting the pedal to the floor.
07-19-07, 04:29 PM
#11
Yeah, there's a tutorial on how to do the mech secs with the A/P mod in the archive.
But a good place to start is stripping the nikki.
Email me at vipernicus42@hotmail.com, I'll send you the draft copy of my tutorial.
Jon
But a good place to start is stripping the nikki.
Email me at vipernicus42@hotmail.com, I'll send you the draft copy of my tutorial.
Jon
07-19-07, 08:06 PM
#12
Pros: Everything Jon said, plus you don't have to hook up all those tubes when you put the breather on. Just set it down and spin on the wing nut, worth the price of admission, in my opinion. Also adjusting, installing and removing the carb with all those things gone is just plain fun.
Cons: Try it and find out. If you use block off plates instead of JB weld, you can always put it back the way it was. My main problems were poor gas mileage, stiff, irregular throttle response and backfiring on high speed decelleration.
What we really need is Jon's (or somebody's) complete tutorial on "the ultimate guide to the S3 Rx7 carburetor" that includes the rat's nest removal, nikki stripping and tuning.
Also some discussion of how to maximize mileage and minimize emissions with this set up would be nice.
Cons: Try it and find out. If you use block off plates instead of JB weld, you can always put it back the way it was. My main problems were poor gas mileage, stiff, irregular throttle response and backfiring on high speed decelleration.
What we really need is Jon's (or somebody's) complete tutorial on "the ultimate guide to the S3 Rx7 carburetor" that includes the rat's nest removal, nikki stripping and tuning.
Also some discussion of how to maximize mileage and minimize emissions with this set up would be nice.
07-20-07, 03:46 AM
#13
i love working on these cars and Ray, i agree with you, just doing it for the fun of it is very much worth it!!
Jon, i'll shoot you an email when i get off of work. i'm on until 7A then i'll sleep for a bit and shoot you an email. if you get this before i get a chance to email you, shoot me over a draft copy. it would be much appreciated! my email address is mazdaverx7@hotmail.com
Jon, i'll shoot you an email when i get off of work. i'm on until 7A then i'll sleep for a bit and shoot you an email. if you get this before i get a chance to email you, shoot me over a draft copy. it would be much appreciated! my email address is mazdaverx7@hotmail.com
